#import msxml3.dll + msxml.idl

Posted on 2002-03-15
Last Modified: 2013-11-20
I would like to import msxml3.dll using a #import because that way I get the smart pointers.

This requires the use of the MSXML2 namespace. I cannot leave out the namespace with
using namespace MSXML2 because the symbols conflict and become ambiguous.

I also wish to use IXMLDOMDocument pointers in my idl file, but idl does not recognise namespaces.

There is a conflict here that I cannot resolve.
If you know how to use the #import and reference the imported symbols in an idl please let me know.
This is a common problem to which there seems to be no solution?

Question by:cmain
  • 3
  • 2
LVL 49

Expert Comment

ID: 6869612
In the IDL file, can't you just use a generic IDispatch pointer?  Just make sure the clients are aware that it is an MSXML3::IXMLDOMDocument .  I think that is stndard operating procedure.

-- Dan

P.S.  That namespace stuff caused me endless grief when I first started using IXMLDOMDocument.

Author Comment

ID: 6876408
Yes, I could do that.
It works reasonably well using IUnknown pointers. The problem is that my customers want strongly typed interfaces; and I cannot, in all good consience, disagree with them!

LVL 49

Expert Comment

ID: 6878207
Worth a try:  Post a 0-pt question with a title like:
   IDL and namespace
and in the question put a link to this Q:

Post it in the XML TA and C++ TA.  Some of those experts distain MFC...

Here is a link to a google thread

In the final post, the guy seems to know what he is talking about.

Perusing some related thereads, it seesm that there is some agreement that problem is that Microsoft seriously goofed in how they set up MSXML.  We wouldn't need to use namespaces at all if they had planned ahead.

At least one person thinks that it is simply impossible to pass an IXMLDomDocument accross a COM interface.

In the final post in this thread, the user says that s similar post was fixed by installiung the latesd Platform SDK.

Good luck.

-- Dan


Author Comment

ID: 6879129
Hi Dan,

I think that the one person who thinks it cannot be done is correct. They have seriously screwed up on the namespaces. The midl compiler should be able to ascertain that IXMLDOMDocument is isomorphic to MSXML2::IXMLDOMDocument and it cannot.

I have searched quite a bit. The only way to actually get it vaguely correct is to use 'using namespace MSXML2' in stdafx.h. The problem with this is that you need to spend hours hacking out the standard headers because they include the older xml declarations.

M$ don't do a whole lot correctly when it comes to c++.

LVL 49

Accepted Solution

DanRollins earned 300 total points
ID: 6879226
Yes, I agree that the problem is that the standard header files assume/require the old definitions.  And for no apparent reason, the XMLDOM headers seem to be brought in  for completely unrelated classes.

>>M$ don't do a whole lot correctly when it comes to c++.

I have to disagree with that.  The next best programming IDE is a distant second place in terms of getting actual programming done.  Microsoft VC++ is often a target just because there are 10 programmers who use it for every one person who uses something else.  Now 10 people are likely to find (and yell about) a bug a lot sooner (and louder) than one person :)  

-- Dan

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
bobThere java chalenge 45 91
no14 challenge 14 62
EvenOdd challenge 10 90
building a service to accessed via telnet client, want colors ? 4 83
This is to be the first in a series of articles demonstrating the development of a complete windows based application using the MFC classes.  I’ll try to keep each article focused on one (or a couple) of the tasks that one may meet.   Introductio…
Introduction: Ownerdraw of the grid button.  A singleton class implentation and usage. Continuing from the fifth article about sudoku.   Open the project in visual studio. Go to the class view – CGridButton should be visible as a class.  R…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
This is used to tweak the memory usage for your computer, it is used for servers more so than workstations but just be careful editing registry settings as it may cause irreversible results. I hold no responsibility for anything you do to the regist…

895 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

17 Experts available now in Live!

Get 1:1 Help Now